add Closeable/Flushable interfaces

router/java/src/net/i2p/router/networkdb/kademlia/PersistentDataStore.java

@@ -13,6 +13,7 @@ import java.io.BufferedOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FilenameFilter;
+import java.io.Flushable;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -193,7 +194,7 @@ class PersistentDataStore extends TransientDataStore {
      * we will soon have to implement a scheme for keeping only
      * a subset of all DatabaseEntrys in memory and keeping the rest on disk.
      */
-    private class Writer implements Runnable {
+    private class Writer implements Runnable, Flushable {
         private final Map<Hash, DatabaseEntry>_keys;
         private final Object _waitLock;
         private volatile boolean _quit;

router/java/src/net/i2p/router/transport/ntcp/NTCPConnection.java

@@ -1,5 +1,6 @@
 package net.i2p.router.transport.ntcp;
 
+import java.io.Closeable;
 import java.io.IOException;
 import java.net.Inet6Address;
 import java.nio.ByteBuffer;
@@ -64,7 +65,7 @@ import net.i2p.util.VersionComparator;
  *</pre>
  *
  */
-class NTCPConnection {
+class NTCPConnection implements Closeable {
     private final RouterContext _context;
     private final Log _log;
     private SocketChannel _chan;